Hot-water boiler for heating greenhouses



(No Model.) I 2 Sheets-Sheet 1.

E. WHITELEY.

HOT WATER BOILER FOR HEATING GREEN HOU$ES.

WITNESSES- 2 Sheets-Sheet Z. E. WHITELEY. HOT WATER BOILER FOR HEATINGGREEN HOUSES. No, 241,790. Pate'ntsd Oct. 4,1381,

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{No Model.)

UNITED STATES EDWARD WHITELEY, OF AN'IRIM, NEW HAMPSHIRE.

HOT-WATER BOILER FOR HEATING GREENHOUSES.

SPECIFICATION forming part of Letters Application filed March 2S, 1981.

To all whom it may concern Be it known that I, EDWARD WEITELEY, acitizen of the United States, residing at Antri m, in the countyofHillsborough and State ot'New Hampshire, have invented certainImprovementsin Hot-Water Boilers for Heating Green' houses, Buildings,850., of which the following is a full, clear, and exact'description,refe: ence being had to the accompanying drawings, making part of thisspecification, in which- Figure l is a perspective view of one of thetwo halves or portions of which my improved boiler iscolnposcd. view ofa complete boiler constructed in accordance with my invention. Fig. 3 isa front elevation of the boiler, one half being shown in section. Fig.4. is a side elevation of one of the two halves or portions of theboiler. Fig. 5 is an elevation of one of the bars which support thefurnace-grate.

Portable hot-water boilers provided with interior smoke-fines and usedfor heating greenhouses, &c., have heretofore been made of a series ofcast-iron plates put together with bolts, and having water-join ts madetight with iron cement. This construction is, however, objectionable,for the reason that the expansion and contraction of the metal is liable.to cause the cement to crack and become loose, causing the joints toleak, and when this occurs it is very expensive and often almostimpossible to repair the boiler, as the cement or rustjoints cannot betightened up, and the attempt to separate the plates at the joints isvery liable to produce breakage of the parts, and thus injure the boilerbeyond possibility of repair.

My invention has for its object to overcome all of these difficulties;and it consists in a hot-water boiler cast in two halves or portions,each of which is provided with a separate inclosed water space orpassage having no direct communication. with that of the other portionwhen the two are put together to form a complete boiler, these twoportions being united by means of ordinary bolts and cement, asmokejoint only being formed between them, by which construction theoperation of casting the parts is greatly facilitated and the liabilityof leakage entirely avoided, as there are no waterjoints, each portionor half of the boiler consisting of a cored or seamless casting, whileFig. 2 is a perspective- Patent No. 247,790, dated October 4, 1881,

(No model.)

the two halves of the boiler can be used indepen denlly, if desired, forheating two separate greenhouses at different elevations, therebyenabling me to beat them uniformly, which cannot be easily accomplishedwith an ordinary single boiler.

In the said drawings, A B represent the two halves or portions of theboiler. which are provided with lugs 12, through which pass the bolts 0,by means 01 which the two portions are held together to form a completeboiler, as seen in Fig. 2, thejoint (I. being made tight by means ofcement placed within the shallow grooves or depressions e f 9, formed inthe adjacent sides of the portions A B. Each of the halves or portions AB is cast in a single piece, with a completely-inclosed water-space, h,Fig. 3, and a smoke fine or passage, i, leading from "the furnace O tothe exit-opening k, to which the smoke-funnel is attached.

D E are openings communicating with the water-space h, with the upperone, D, of which the flow-pipe is connected, while the returnpipe isconnected with the lower opening, E, the ordinary packed socket-jointbeing used at these points.

G is the base or bottom of the boiler,-within which is formed theash-pit m.

H H represent the ash-pit doors, and I I the furnace-doors, these doorsbeing arranged to slide to one side in horizontal guides or ways a.

19 represents the furnace-grate, which is made in independent sections,each section having journals, which rest in bearings 10 in two supporting-bars, K, placed one at the front and the other at the rear ofthe furnace, the front journals, q, having square ends and being adaptedto be rotated by a key or wrench applied thereto, when exposed, bysliding back the doors L L. The grate-supporting bars K'- rest on lugsor projectionso' 8, Figs. 3 and 4; and to facilitate the insertion ofthese bars K a rail or ledge, t, Figs. 3 and 4, is formed on each sideof the furnace, these rails forming a track or way for guiding the barsK as they are pushed along until they drop onto the projections r s,where they are held in place by the adjacent ends of the rails t,- andby this construction I am enabled to insert the supporting-bars K withmuch greater ease than heretofore, as the necessity of holding up theseheavy bars by the hand while fitting them in place is avoided, it beingonly required to place the supporting-bars on the rails and push themalong until they drop into their places.

From the foregoing it will be seen that as each half of the boilerconsists of a single cored or seamless casting completely inclosing itsown water-space, which is entirely separate from and independent of thewater-space ot'the other half and has no direct communication therewith,all liability of leakage is entirely avoided, as there are no\vaterjoints, the joint (1 between the two portions A B, when put together, being merely a smoke-joint, which can be easily kept tight, andconsequently a boiler constructed in accordance with my invention can bekept in repair at a trifling expense, which is a very importantconsideration in boilers of this description, while its durability isincreased to such an extent that it will outlast many times any boilerconstructed, as heretofore, out of a series of cast-iron plates puttogetherwith bolts and cement. Furthermore,

the cost is greatly reduced, as my construction enables me to cheaplyproduce a reliable boiler having a smoke flue or lines extending in ahorizontal, or nearly horizontal, direction, which is a difficult andexpensive operation when made of a series of cast-iron plates or pieceswith separate water-j oints, as heretofore,

the water will flow from one portion or half of the boiler to the other.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is-

1. A hot-water boiler formed of two halves or portions, A B, castseparately, and each provided with an independent inclosed waterspace,It, having no direct communication with that of the adjacent portionunited thereto, substantially as and for the purpose set forth.

2. In a hot-water boiler having an interior smoke flue or fines, thecombination of the two separately-cast halves or portions A B, eachhaving a separate and independent inclosed water-space, it, connectedtogether without a wateroint, so that a smoke joint, (1, only will beformed between them substantially in the manner and for the purposedescribed.

\Vitness my hand this 24th day of March, A. D. 1881.

E D WARD W H llELEY. ln presence of P. E. Tnsonnnaouna, \V. J.CAMBRIDGE.

